Electroactive materials
View Patent ↗There is provided an electroactive compound having Formula I In the formula: Ar 1 , Ar 2 , and Ar 3 are the same or different and are aryl groups; R 1 is the same or different at each occurrence and is D, alkyl or aryl; a is an integer from 0-4. The compound has a LUMO level deeper than −2.3 eV and a band gap of at least 2.9 eV.
1. An electroactive compound having Formula II
wherein:
Ar 1 is an aryl group;
R 1 is the same or different at each occurrence and is D, alkyl or aryl;
R 2 is an electron-withdrawing group;
R 3 is H, D, carbazolyl, diarylamino, an electron-withdrawing group, or a deuterated analog thereof;
R 4 is the same or different at each occurrence and is cyano, nitro, or —SO 2 R, where R is alkyl, or a deuterated analog thereof;
R 5 is the same or different at each occurrence and is D, alkyl, alkoxy, silyl, siloxane, an electron-withdrawing group, or a deuterated analog thereof;
a is an integer from 0 to 4;
b is an integer from 0 to 4;
c is an integer from 1 to 5;
d is an integer greater than 0, such that c+d≦5; and
e is an integer from 0 to 4
and further wherein the compound has a LUMO level deeper than −2.3 eV and a band gap of at least 2.9 eV.
2. The compound of claim 1 , wherein Ar 1 is phenyl, biphenyl, naphthyl, binaphthyl, phenylnaphthyl, naphthylphenyl, a substituted derivative thereof, or a deuterated analog thereof.
3. The compound of claim 1 , wherein R 1 =D and a and b are both greater than 0.
4. The compound of claim 1 , wherein R 2 is cyano, nitro, or —SO 2 R, where R is alkyl.
5. The compound of claim 1 , wherein R 3 is carbazolyl, diphenylamino, or a deuterated analog thereof.
6. The compound of claim 1 , wherein e=0.
7. The compound of claim 1 , wherein d=1 and R 2 ═R 4 ═CN.
8. A compound selected from compound B1 through B11
9. An organic electronic device comprising a first electrical contact, a second electrical contact and a photoactive layer therebetween, the photoactive layer comprising an electroactive compound having Formula II
wherein:
Ar 1 is an aryl group;
R 1 is the same or different at each occurrence and is D, alkyl or aryl;
R 2 is an electron-withdrawing group;
R 3 is H, D, carbazolyl, diarylamino, an electron-withdrawing group, or a deuterated analog thereof;
R 4 is the same or different at each occurrence and is cyano, nitro, or —SO 2 R, where R is alkyl, or a deuterated analog thereof;
R 5 is the same or different at each occurrence and is D, alkyl, alkoxy, silyl, siloxane, an electron-withdrawing group, or a deuterated analog thereof;
a is an integer from 0 to 4;
b is an integer from 0 to 4;
c is an integer from 1 to 5;
d is an integer greater than 0, such that c+d≦5; and
e is an integer from 0 to 4
and further wherein the compound has a LUMO level deeper than −2.3 eV and a band gap of at least 2.9 eV.
10. The device of claim 9 , wherein the photoactive layer comprises the electroactive compound of Formula II and further comprises a host material.
11. The device of claim 9 , wherein the photoactive layer consists essentially of the electroactive compound of Formula II and a host material.
12. The device of claim 9 , wherein the photoactive layer comprises a blue luminescent compound, a host material, and a compound having Formula II.
13. The device of claim 9 , wherein the photoactive layer consists essentially of a blue luminescent compound, a host material, and a compound having Formula II.